[IMP] stock, sale_stock: label & tooltip clarification

Rename shipping policy in the UI. Also adapt the stock picking
state's tooltip in order to explain the reservation process
according to shipping policy

closes odoo/odoo#24039

addons/sale_stock/models/sale_order.py

@@ -21,8 +21,8 @@ class SaleOrder(models.Model):
         'account.incoterms', 'Incoterms',
         help="International Commercial Terms are a series of predefined commercial terms used in international transactions.")
     picking_policy = fields.Selection([
-        ('direct', 'Deliver each product when available'),
-        ('one', 'Deliver all products at once')],
+        ('direct', 'As soon as possible'),
+        ('one', 'When all products are ready')],
         string='Shipping Policy', required=True, readonly=True, default='direct',
         states={'draft': [('readonly', False)], 'sent': [('readonly', False)]}
         ,help="If you deliver all products at once, the delivery order will be scheduled based on the greatest "

addons/stock/models/stock_picking.py

@@ -200,12 +200,12 @@ class Picking(models.Model):
         ('cancel', 'Cancelled'),
     ], string='Status', compute='_compute_state',
         copy=False, index=True, readonly=True, store=True, track_visibility='onchange',
-        help=" * Draft: not confirmed yet and will not be scheduled until confirmed.\n"
-             " * Waiting Another Operation: waiting for another move to proceed before it becomes automatically available (e.g. in Make-To-Order flows).\n"
-             " * Waiting: if it is not ready to be sent because the required products could not be reserved.\n"
-             " * Ready: products are reserved and ready to be sent. If the shipping policy is 'As soon as possible' this happens as soon as anything is reserved.\n"
-             " * Done: has been processed, can't be modified or cancelled anymore.\n"
-             " * Cancelled: has been cancelled, can't be confirmed anymore.")
+        help=" * Draft: The transfer is not confirmed yet. Reservation doesn't apply.\n"
+             " * Waiting another operation: This transfer is waiting for another operation before being ready.\n"
+             " * Waiting: The transfer is waiting for the availability of some products.\n(a) The shipping policy is \"As soon as possible\": no product could be reserved.\n(b) The shipping policy is \"When all products are ready\": not all the products could be reserved.\n"
+             " * Ready: The transfer is ready to be processed.\n(a) The shipping policy is \"As soon as possible\": at least one product has been reserved.\n(b) The shipping policy is \"When all products are ready\": all product have been reserved.\n"
+             " * Done: The transfer has been processed.\n"
+             " * Cancelled: The transfer has been cancelled.")
 
     group_id = fields.Many2one(
         'procurement.group', 'Procurement Group',